Today, the great pyramid at giza near cairo, egypt stands 137 meters tall, coming to a point. its base is a square with each side measuring 230 meters wide. what is the slope of the pyramid?

Hope you can see the picture and understand the drawings.

It can seem complex at first but you just have to think it through. 

I use pythagoras' theorem to find the diagonal of the base square and then use that information along with the height with the aid of that ever so handy pythagoras' theorem to find the length of the slope.